| // Copyright (C) 2017-2021 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING3. If not see |
| // <http://www.gnu.org/licenses/>. |
| |
| // { dg-do compile { target c++14 } } |
| |
| // PR 78991 |
| // This failed to compile with Clang because the result_of expression causes |
| // instantiation of _Iter_comp_iter::operator() outside the immediate context. |
| |
| #include <algorithm> |
| |
| struct function |
| { |
| function() = default; |
| |
| template<typename F, typename = std::result_of_t<F&(int, int)>> |
| function(F) { } |
| |
| bool operator()(int x, int y) const { return x < y; } |
| }; |
| |
| int main() |
| { |
| int a[2]{ 2, 1 }; |
| std::sort(a, a+2, function{}); |
| } |
